NCU 2 siA tri Mean vi Media-n x{q llritrau ra thi s6 lieu le can d6i. Trong vi du I c6c
c6r s6 Iieu le can d6i tru cot.\6 b6ng" hoi bi ICch.
",, ,., ,-,,:^PI::rii"iT6:,fitdq iecn cnudn m6u cho ra.bi6t d6 ph6n trin cia s6 lifu quanh
q,:.rl ,Iulq brnh, ncu c6c giii.tri.ndy cdng nhd chring t6 s5 ligu cang tap rrung.
Nguii ra tinh
thErn hc s0 bi€n dong (CV) dC kdt luan d-o ph6n tdn c-ria s6 fieu ro fr;
CV= D0 t€ch ctrudrV rrung Utnii, CVodqng "/".- N6rirrilehiern ngoni ddng ruQng
ll'"!).1f:,:?r",.lu s.ti ti€u pnan t6n. Neu rhi nshiem i*g pr,org ihi'"ghiem thi cvyo> t0%
l:^r:-.i:q: fii En. lheo gili rri c0a CV c6 th6 dirng cric t& dd chi muc?6 i<triic nhau nhu: r6t
r:rp rrung. rep - Kurtosis rrung, ruorg tldnh gi6 .tusng d6i tap trung, mat r6t dO phan phiii cUa day s6 lip'u phan t6n, phan hin, tuong d6i phan tiin.c6 nhon hon hav tu hon duung mdt d6 chudn
11c, Ni1 rrons khoans tr -2 diin 2 thi c6 ,ua *r ,a rrdr'ii, _i .,,liail '-"
. . - skewness d6nh giri.dudng phdn phiSi lech tr6i hay l€ch pfrai. N6u rroig U,oang ttr _Z der. - riri c6 th€ coi d0 l6,ch xdp xi chudn
Confidence Level'dLroc hiiiu Id nu.a.d6 dii khodng tin c.iy. Cii sri Confidence
l.:,] :,, I i1' ll"il* j,, :?y.:i 1,le binh rdng thri td, iM;;",_; ]M.un**). rrong vi du
1l, ,1]', !i.;li t" khoans tin cdv e5Yo cita "dii b6ng" tir ( 26.4- o.5s , 26.4 +0.55),-tric li
Vi dg 2: Tinh th5ng Lc r:'ri tl il:1, Liri,i lL(rrB igram) coa 16 chuQt c6i tai th&i diiSm cai siia
nhu sau
s4.l 149.8124 46 44.t 34 152.6 54.4 56.1 52 | 51.9 I s4 I 58 I 39 132.7 I 58.5
Vi d-g 3: Tinh tlr6ng kC m0 tir chr: hinr iuong protein( gam) trong ,l
O0 gam bot mi ciacScmeulhi
* Tqo midn phAn t6 (ein); eidtri canjuo"il0=12,
"a, iic".r::ii, ei6'ii1 uoa"tans t=i.1.2. Tti chrtc rtd 1.2. Tti chrtc rtd
,Ta chtc dd (nhar d6) ra bidu dd bi€u !i€n tin s6 xudt hi€n ciu .6 rigu trong
"6c khoing crich
ddu nhau. D€ vE t6 chric d6 cAn phrii ti6n henh phen td (nh6m s6 lieui
a. Tgo miin phdn t6